There was also Bicentennial Man, Patch Adams, Moscow On The Hudson, Good Morning Vietnam, The Fisher King, and The Birdcage. And he was also in one of my three favorite Terry Gilliam movies, The Adventures Of Baron Munchhausen. But if you could only pick nine movies and Mork and Mindy to show his evolution as an actor, the ones you chose are all right on the money.
I remember right after he passed, Disney ran Aladdin, commercial free on TV (even had a tribute to Robin Williams at the end). (Side note, wish I could see the original Aladdin that ran in theater, the opening song was different)
I grew up on his witty shenanigans. One thing's for sure: I'll never give up liking him, despite the fact he's gone. He may be gone, but his witty mischief and shenanigans will never leave us or be forgotten.
The movie from 1991 is 'Hook'. If you want to look up more of his films (maybe you can figure out the movies featured in this well done piece of art by looking at pictures of the movies listed there) you can visit his wikipedia page!